Seawater pollution has been identified as a potential danger to metallic materials used under service conditions. Seawater foulants have adequate corrosive environment due to chemical ingredients especially halides compounds. Overall bacterial activity also results in the formation of highly aggressive sulphur bearing compounds, free sulphide, and ammonia in seawater. The corrosion behaviour of Fe-C alloy in the Laboratory has been investigated in presence of seawater. The deposition of fouling debris and biofouling were studied. The foulants have deleterious effect on the protectivity of the surface and rapid degradation of the alloy is noted; The scales morphologies were determined by Scanning Electron Microscopy techniques.